Hudson murder trial spectators line up for seats

In this Oct. 6, 2008 file photo, cast member Jennifer Hudson poses at the premiere of the film "The Secret Life of Bees" at the Academy of Motion Picture Arts and Sciences in Beverly Hills, Calif. (AP Photo/Chris Pizzello, file)

April 20, 2012 9:57:44 AM PDT

April 20, 2012 (CHICAGO) --

The murder trial against William Balfour begins Monday, but people wanting to watch the trial in person have to register today.

Those who want to sit in the courtroom can register Friday between 3-5 p.m. Friday.

For every day of the trial, court watchers must sign up in person in the lobby of the criminal courthouse the day before they want to be in court.

Balfour is accused of murdering three members of Jennifer Hudson's family.